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Do not switch on
for the first time
without first
filling with oil.
30L & 40L
AIR COMPRESSOR
EAC30 & EAC40
INSTRUCTION MANUAL
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Warning labels explained
On the tank of your air compressor you will notice various
warnings about the operation of the compressor. These
warnings and the procedures associated with them are
explained fully in this manual on the following pages.
Please take note of these. They are important for your
safety and that of others in the vicinity.
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Do not switch on
for the first time
without first
filling with oil.
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Unit starts
automatically.
Keep oil level as shown:
To prevent build-up of
condensation, open
drain cock daily
When filter becomes
dirty or oily, clean or
replace filter. Refer to
instruction manual.
Switch off power supply,
remove plug & relieve
air pressure prior to
commencing service
tasks.
Use only oil grade
specified in instruction
manual.
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Read instruction manual
prior to starting unit.
High voltage used on
this equipment. Switch
off power supply &
Air discharged from
this unit is not
Test the safety relief
valve daily.
suitable for human
consumption.
This equipment
operates from
AC mains only.
Refer the instruction
manual.
remove plug from mains
before removing any
covers. Ensure mains
outlet is adequately
rated for this unit.
3
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Introduction
Description of symbols
Your new GMC power tool will more than satisfy
your expectations. It has been manufactured under
stringent GMC Quality Standards to meet superior
performance criteria.
The rating plate on your tool may show symbols.
These represent important information about the
product or instructions on its use.
Wear hearing protection.
Wear eye protection.
Wear breathing protection.
You will find your new tool easy and safe to operate,
and, with proper care, it will give you many years
of dependable service.
Double insulated for additional protection.
CAUTION. Carefully read through this entire Instruction
Manual before using your new GMC Power Tool. Take
special care to heed the Cautions and Warnings.
Conforms to relevant standards
for electromagnetic compatibility.
Your GMC power tool has many features that will make
your job faster and easier. Safety, performance, and
dependability have been given top priority in the
development of this tool, making it easy to maintain
and operate.
Specifications
EAC30
EAC40
2HP/1600W
230–240V ~ 50Hz
2850 min-1 2850 min-1
Power:
Voltage:
Environmental protection
No load speed:
Recycle unwanted materials instead
of disposing of them as waste. All tools,
hoses and packaging should be sorted,
taken to the local recycling centre and
disposed of in an environmentally safe way.
Discharge pressure: 0.8 MPa(115 psi) 0.8 MPa(115 psi)
Tank capacity:
Air outlet size:
Net weight:
30 litres
40 litres
6.35mm (1/4”)
29kgs
6.35mm (1/4”)
34kgs
Cut-in pressure (factory set): 0.6MPa (85psi)
Cut-out pressure (factory set):0.8MPa (115psi)
Maximum output pressure: 0.8MPa (115psi)
Free air delivery:
127 l/min
(4.5 CFM)
150 l/min
(5.4 CFM)
Pump displacement: 206 l/min
(7.2CFM)
216 l/min
(7.65CFM)
4
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7. Dress correctly. Do not wear loose clothing or
jewellery. They can be caught in moving parts. Rubber
gloves and non-slip footwear are recommended when
working outdoors. If you have long hair, wear a protective
hair covering.
8. Use safety accessories. Safety glasses and earmuffs
should always be worn. A face or dust mask is also
required if the sanding operation creates dust.
9. Do not abuse the power cord. Never pull the cord to
disconnect the tool from the power point. Keep the cord
away from heat, oil and sharp edges.
10. Secure the work piece. Use clamps or a vice to hold the
work piece. It is safer than using your hand and frees
both hands to operate the tool.
General safety instructions
To use this tool properly, you must observe the safety
regulations, the assembly instructions and the operating
instructions to be found in this Manual. All persons who use
and service the machine have to be acquainted with this
Manual and must be informed about its potential hazards.
Children and infirm people must not use this tool. Children
should be supervised at all times if they are in the area in
which the tool is being used. It is also imperative that you
observe the accident prevention regulations in force in your
area. The same applies for general rules of occupational
health and safety.
WARNING. When using power tools, basic safety precautions
should always be taken to reduce the risk of fire, electric
shock and personal injury. Also, please read and heed the
advice given in the additional important safety instructions.
11. Do not overreach. Keep your footing secure and
balanced at all times.
12. Look after your tools. Keep tools sharp and clean for
better and safer performance. Follow the instructions
regarding lubrication and accessory changes. Inspect
tool cords periodically and, if damaged, have them
repaired by an authorised service facility. Inspect
extension cords periodically and replace them if
damaged. Keep tool handles dry, clean and free from oil
and grease.
13. Disconnect idle tools. Switch off the power and
disconnect the plug from the power point before
servicing, when changing accessories and when the tool
is not in use.
14. Remove adjusting keys and wrenches. Check to see
that keys and adjusting wrenches are removed from the
tool before switching on.
15. Avoid unintentional starting. Always check that the
switch is in the OFF position before plugging in the tool
to the power supply. Do not carry a plugged in tool with
your finger on the switch.
1. Keep the work area clean and tidy. Cluttered work areas
and benches invite accidents and injury.
2. Consider the environment in which you are working.
Do not use power tools in damp or wet locations. Keep
the work area well lit. Do not expose power tools to rain.
Do not use power tools in the presence of flammable
liquids or gases.
3. Keep visitors away from the work area. All visitors and
onlookers, especially children and infirm persons, should
be kept well away from where you are working. Do not
let others in the vicinity make contact with the tool or
extension cord.
4. Store tools safely. When not in use, tools should be
locked up out of reach.
5. Do not force the tool. The tool will do the job better and
safer working at the rate for which it was designed.
6. Use the correct tool for the job. Do not force small tools
or attachments to do the job best handled by a heavier
duty tool. Never use a tool for a purpose for which it was
not intended.
16. Use outdoor rated extension cords. When a tool is used
outdoors, use only extension cords that are intended for
outdoor use and are so marked.
17. Stay alert. Watch what you are doing. Use common
sense. Do not operate a power tool when you are tired.
5
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• The solvents trichloroethane and methylene chloride can
chemically react with the aluminium used in some paint
spray guns and form an explosion. If these solvents are
used, ensure that only stainless steel spray equipment is
connected. The compressor is not affected by the use of
these solvents.
• Never directly inhale the compressed air produced by a
compressor and do not use it for charging breathing tanks.
• Do not use welding equipment in close proximity to the
compressor. Do not weld anything to the air tank of the
compressor: this could dangerously weaken the tank and
will void the warranty.
• Do not use the compressor outdoors when it is raining
or on a wet surface; either situation could cause an
electric shock.
• Always shut off the compressor after use and before
servicing. Push the on/off knob down, wait for the
pressurised air to bleed from the tank from the release
valve and then remove the electrical plug from the
power supply.
• Check the maximum pressure rating of any tools or
accessories that you intend using with the compressor.
The output pressure of the air from the compressor must
be regulated so that it never exceeds the rated pressure
of the tool or accessory.
• To avoid the risk of burns and injury from moving
parts, do not operate the compressor with the safety
cover removed. Allow hot parts to cool before handling
or servicing.
18. Check for damaged parts. Before using a tool, check
that there are no damaged parts. If a part is slightly
damaged, carefully determine if it will operate properly
and perform its intended function. Check for alignment of
moving parts, binding of moving parts, breakage of parts,
proper mounting and any other conditions that may
affect the operation of the tool. A part that is damaged
should be properly repaired or replaced by an authorised
service facility, unless otherwise indicated in this
Instruction Manual. Defective switches must be replaced
by an authorised service facility. Do not use a tool if the
switch does not turn the tool on and off correctly.
19. Guard against electric shock. Prevent body contact
with grounded objects such as water pipes, radiators,
cookers and refrigerator enclosures.
20. Use only approved parts. When servicing, use only
identical replacement parts. Use an authorised service
facility to fit replacement parts.
Additional safety rules for air compressors
WARNING. Before connecting a tool to a power source
(mains switch power point receptacle, outlet, etc.) be sure
that the voltage supply is the same as that specified on the
nameplate of the tool. A power source with a voltage greater
than that specified for the tool can result in serious injury to
the user, as well as damage to the tool. If in doubt, do not
plug in the tool. Using a power source with a voltage less
than the nameplate rating is harmful to the motor.
Always remove the plug from the mains socket before
making any adjustments or maintenance, including
renewing the lubricating oil.
• To reduce the risk of fire or explosion, never spray
flammable liquids in a confined area. It is normal for
the compressor motor and pressure switch to produce
sparks during use. If sparks come into contact with petrol
vapours or solvents, they may ignite the vapours and
cause a fire or explosion.
• Always operate the compressor in a well ventilated area.
Do not smoke while spraying. Do not spray where sparks
or flames are present. Keep the compressor as far away
from the spray area as possible.
• Be certain to read all the labels on the containers of paint
or other materials to be sprayed. Closely follow all safety
instructions. Use a respirator mask if there is a chance
that you might otherwise inhale the spray material.
Carefully check the effectiveness of any respirator mask
you intend using.
• Always wear safety goggles or glasses when using the
air compressor. Never point the nozzle of an accessory
towards any part of your body or towards another person.
• Do not attempt to adjust the pressure switch or the
release valve located under the pressure switch cover.
6
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• Drain the moisture from the tank daily. It will help
prevent corrosion.
• Pull the ring on the safety valve daily to ensure that it
operating properly and to clear any possible instructions.
• Keep the compressor at least 300mm from the nearest
wall to ensure adequate ventilation for cooling purposes.
• Before transporting the compressor make sure that
the pressurised air is bled from the tank and that the
compressor is firmly secured.
• Protect the air hose and cordset from damage. Inspect
for weak or worn spots regularly and replace if necessary.
• Do not use an extension cord with this product. Use
additional air hose instead of an extension cord to
prevent power loss and possible damage to the motor.
Use of an extension cord voids the warranty.
• After long working periods external metal parts could
be hot.
• Always press the on/off button down to switch off the
compressor before switching off the power or removing
the power plug.
Never apply the outlet air of this compressor directly on to
any part of a person’s body. Do not attempt to block the air
outlet with your finger or any part of your body.
The tool must be used only for its prescribed purpose.
Any use other than those mentioned in this Manual will
be considered a case of misuse. The user and not the
manufacturer shall be liable for any damage or injury
resulting from such cases of misuse.
The manufacturer shall not be liable for any changes made
to the tool nor for any damage resulting from such changes.
Even when the tool is used as prescribed it is not possible to
eliminate all residual risk factors. The following hazards may
arise in connection with the tool’s construction and design:
• Damage to the lungs if an effective breathing mask is
not worn.
• Damage to hearing if effective earmuffs are not worn.
• Damage to the eyes if effective safety goggles or shield
are not worn.
WARNING. In the event that an air line is cut or broken, the
air supply must be turned off at the compressor. A broken
air line which is not supported is extremely dangerous and
can whip around very quickly, both with the capability of
striking people, and blowing foreign particles into the air.
• Do not use the compressor without first checking the oil
level. It must be close to the red circle as viewed on the
oil gauge.
Note. The compressor is supplied empty of oil. It must be
filled with oil before first use.
• After using the compressor, switch off the on/off button,
disconnect the power supply and open the outlet valve to
release the pressure.
Do not attempt to catch the air line but immediately keep
bystanders well clear and turn off the air supply to the hose,
turn off the compressor at the On / Off button, and then
remove the hose from the compressor.
Contents of carton
• Do not attempt to remove any part of the machine whilst
it is under pressure.
• Ensure that the lubricating oil is clean and that the oil
level is maintained at the correct level. Replace the oil
as indicated in the Maintenance section of this Manual.
• Use safety equipment including safety goggles or
shield, ear protection, breathing or respirator mask
and protective clothing.
• 400ml of oil in a sealed container
• 2 Wheel assemblies (2 each of wheels, wheel bolts, nuts)
• Air filter
• 2 Rubber feet assemblies
Wear goggles
Wear earmuffs
Wear a breathing mask
7
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Know your product
1. Handle
1
14
2. Pressure switch cover
3. On/off switch
15
13
4. Tank pressure gauge
5. Regulating knob
6. Regulated air outlet
7. Regulated outlet pressure gauge
8. Safety valve
9. Non-return valve
10. Drain cock
11. Air tank
3
2
5
16
4
9
7
6
12. Wheel (x 2)
13. Safety cover
18
14. Oil filling plug
15. Air filter assembly
16. Oil level glass
17. Oil drain plug (not shown)
18. Air tap
11
12
10
8
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Rubber feet
Unpacking
Fit the rubber feet on the bracket
on the front underside of the tank
using the screws, washers and
nuts supplied.
Due to modern mass production techniques, it is unlikely
that your GMC Power Tool is faulty or that a part is missing.
If you find anything wrong, do not operate the tool until the
parts have been replaced or the fault has been rectified.
Failure to do so could result in serious personal injury.
Assembly
Wheels
Fitting the wheels
Oil
WARNING. The air compressor must be filled with oil
before first use.
1. To fit the wheels (12) first
insert the wheel bolt through
the wheel.
2. Fit the wheel assembly
through the holes in the
bracket under the tank.
4. Completely tighten the nut
from the underside of the
wheel with spanner while
holding the outer side nut with
another spanner.
To prevent possible spillage of oil during transport, the
compressor oil is supplied in a separate container. It must
be added to the compressor before turning the compressor
on. Failure to add the oil will cause non-repairable damage
to the compressor and will void the warranty.
1. Remove the plastic oil filling plug (14) located on the top
of the crank case of the compressor housing.
5. Repeat for the second wheel.
2. Use the oil supplied to fill the crank case until the oil level
as seen in the oil level glass (16) is up to the mid point of
the red circle.
3. Replace the oil filling plug (14). Ensure the plug is fully
fitted and firmly in position.
Nut
Wheel bolt
Wheel
Bracket
9
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3. Open the regulated output
valve (6). Open the valve by
rotating the air tap (18) so it is
in line with the air outlet (refer
to the OPEN picture).
To close the valve, rotate the
air tap so it is facing to the
right or the left side of the air
valve (refer to the CLOSED
picture).
4. Start the compressor by
following the procedure in
the section “To start and stop
the compressor”. For the first
time of operation, run the
compressor for 10 minutes
with no load and with the
outlet valve open to ensure all
parts are well lubricated.
Air filter
WARNING. The air filter must be added before first use.
Failure to fit the air filter will
damage the compressor and will
void the warranty.
1. To fit the air filter (15) you
need to locate the inlet
hole on the right side of the
compressor housing then
carefully hand tighten the
thread of the the air filter in
a clockwise direction until tight.
OPEN
Maintaining the air filter
1. To clean the air filter insert you need to take the air filter
(15) apart first. Undo the wing nut, and remove the cover
along with the washer from the air filter.
CLOSED
WARNING. Be aware that pressurised air will be discharged
from the outlet and care should be taken that this discharge
is not directed towards you the operator, or other persons
within the area.
To start & stop the compressor
1. Check the rating label on the compressor indicates
230V–240V.
2. Push out the air filter insert and soak it in warm soapy
water, rinse and wring dry.
3. Replace the air filter insert cartridge, then the air filter
cover, washer, then wing nut.
2. Plug in the mains cable of the compressor to a standard
240V household power point and turn on.
3. To start the compressor, lift the On/Off switch (3) on the
pressure switch cover (2).
Pre-start routine
4. To stop the compressor, push the On/Off switch down.
1. Ensure that the location for the compressor is clean,
dry and well ventilated.
2. Ensure the crank case has been filled with oil and is
at the correct level, and the air filter has been fitted.
ON
OFF
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• Press down the on/off switch (3).
• Wait for the pressurised air to bleed from the release
valve under the pressure switch cover (2).
Operation
1. The pressure in the tank is controlled by the action of
the pressure switch located under the pressure switch
cover (2). When the set maximum pressure is reached
the pressure switch activates and the motor is switched
off. The pressure then decreases as the air is used by the
connected tool until the set minimum pressure is reached
after which the pressure switch causes the motor to
switch on again. The operator of the compressor should
be well aware that during use of the compressor the
motor will start and stop under the influence of the rising
or falling pressure in the tank. The motor will start without
any warning.
2. The maximum and minimum pressures are factory set
and the operator should not try to change them.
3. All accessories are connected
to the regulated air outlet (6).
4. The pressure of the regulated
outlet, as shown on the
regulated outlet pressure
Note. When you press the button down you will hear a short
air discharge of approx ½ second however, this discharge
only occurs if the compressor is actually running at the time,
and not in idle.
• Switch off the electrical
power supply and remove the
electrical plug.
• Pull the ring on the safety
valve (8) to ensure all the
pressurised air is released
from the tank, or open the
drain cock to release the
pressure from the tank.
WARNINGS.
1. Never attempt to remove any part of the compressor
whilst the tank is under pressure.
2. Never attempt to remove any electrical component whilst
the compressor is connected to the power supply. Switch
off the power and remove the electrical plug.
gauge (7), can be changed by
turning the regulating knob (5).
Note. To obtain the correct
output reading on the regulated
output gauge, the air must be flowing through the outlet.
3. Do not adjust the safety valve.
4. Do not use an electrical extension cable.
5. If the release valve under the pressure switch cover (2)
fails to operate when the on/off button is pressed down,
switch the power supply off and determine the nature of
the fault.
6. Ensure that the lubricating oil is clean and that the oil
level is maintained at the mid point of the red circle in the
oil level glass (16).
7. Take care when discharging air from the tank, i.e.
from the safety valve, the drain cock or the air outlet.
Compressed air can be extremely dangerous. Take care
the discharge air does not cause dust, stones or any
other foreign particles to be blown through the air and
that the air is discharged in a safe manner.
The regulating valve should be adjusted and the gauge read
with the outlet valve open and the air being discharged from
the regulated outlet through the accessory being used.
To increase the air pressure, rotate the regulating valve
clockwise. To decrease the pressure, rotate the regulating
valve anti-clockwise.
Note. If you do not allow the air to discharge while you
are setting the regulator, the pressure as indicated on the
regulated outlet gauge will be incorrect. This gauge ONLY
indicates the correct pressure while air is being discharged
from the outlet.
5. On completion of the task, i.e. when you have finished
using the compressor, or when you are leaving the
compressor unattended, turn off the compressor in the
following way:
11
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Troubleshooting
Trouble
Possible cause
Possible remedy
Power fault or supply voltage too low
Power cord too long or too thin
Check the power supply
Motor will not run, running too
slow or becoming excessively hot
Use authorised service centre
to replace the power cord
Faulty pressure switch
Faulty motor
Use authorised service centre
to repair or replace the switch
Use authorised service centre
to repair or replace the motor
Main compressor sticking/tight
Use authorised service centre
to repair or replace faulty parts
Moving parts damaged by heat
due to insufficient lubrication
Use authorised service centre to
check crankshaft, bearings, con rod,
piston rings, etc and replace
where necessary
Main compressor sticking/tight
Vibration or abnormal noise
Moving parts damaged or blocked
by foreign particle
Loose part
Use authorised service centre
to check and repair if necessary
Foreign body in main compressor
Piston connecting with the valve seat
Moving parts excessively worn
Use authorised service centre
to check and clean if necessary
Use authorised service centre
to increase size of gasket
Use authorised service centre
to repair or replace
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Troubleshooting continued
Trouble
Possible cause
Suggested Remedy
Motor running too slow
Use authorised service centre to check
and repair if necessary
Insufficient pressure or decreased
outlet capacity
Dirty air filter cartridge
Leaking safety valve
Clean or replace the filter cartridge
Use authorised service centre to repair
or replace the switch
Leaking pipe
Use authorised service centre to check
and repair if necessary
Damaged gasket
Use authorised service centre to check
and repair if necessary
Damaged or carbon coated valve seat
Damaged piston ring or cylinder
Oil level too high
Use authorised service centre to check
and repair if necessary
Use authorised service centre to check
and repair if necessary
Maintain the oil at the correct level
Excessive oil consumption
Check and clean
Hole in oil filling plug (14) blocked
Use authorised service centre to check
and repair if necessary
Piston ring and/or cylinder worn or
damaged
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Maintenance
1. After the first 10 hours of working, empty the crank case
of oil and refill with clean oil by removing the crank case
oil plug (left hand side of the crank case at the bottom)
Note. Use good quality compressor lubricating oil.
• SAE30 or L-DAB 100 over 10°C
General inspection
1. Regularly check that all the fixing screws are tight.
2. The supply cord of the tool should be checked frequently
for damage. If damaged, have the cordset replaced by an
authorised service facility to avoid
a hazard.
Cleaning
• SAE10 or L-DAB 68 under 10°C
1. Keep the tool’s air vents unclogged and clean at
all times.
2. After each subsequent 500 hours of operation, again
drain the oil and refill the crank case with clean oil.
2. Remove dust and dirt regularly. Cleaning is best done
with a soft brush or a rag.
3. After each day of operation, use the drain cock (11) under
the tank to drain off any condensate.
3. Re-lubricate all moving parts at regular intervals.
4. Regularly check the air filter insert cartridge inside the
air filter assembly (17) and clean or replace the insert
when necessary.
5. Check daily the operation of the safety valve. This check
should be performed when the tank contains close to
max pressure in the tank.
4. If the body of the compressor needs cleaning, wipe it
with a soft damp cloth. A mild detergent can be used but
nothing like alcohol, petrol or other cleaning agent.
5. Never use caustic agents to clean plastic parts.
CAUTION. Water must never come into contact
with the tool.
To check the valve, pressurise the tank, and pull the ring
OUTWARDS on the safety valve.
Power cord maintenance
Air should discharge from the valve.
Only an authorised service centre should replace the
cordset or carry out other repairs. If the cordset is damaged
or worn, have it repaired or replaced by an authorised
service centre.
Release the ring of the safety valve. When the ring is
released the air discharge must stop.
WARNINGS.
Safety glasses must be worn when performing this test.
Do not have your face close to the safety valve when
performing this test as air will discharge from the valve at a
high force.
If the safety valve does not operate correctly in any way as
described above, turn off the compressor immediately and
have the compressor and safety valve checked and tested
at an authorised Service centre.
DO NOT CONTINUE TO USE THE COMPRESSOR
IN ANY WAY IF THE SAFETY VALVE DOES NOT
WORK AS ABOVE.
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GMC customer assist
If your product needs repairing, replacing,
technical service or you simply need help or advice,
please contact us on our Customer Assist Line
1300 880 001 (Australia) or 0800 445 721 (New Zealand).
For prompt service we suggest you log your service request
access to the Internet, please contact our service department
on 1300 880 001 (Australia) or 0800 445 721 (New Zealand).
7am –7pm, 7days a week (AEST).
Please note that if repair or replacement is required,
you must provide a valid original purchase receipt.
You will need the following details at hand to log your service request;
Personal details: First & Last name, address, pick up address,
contact phone numbers, email address
Product details: Product number, date of purchase, retailer bought from,
State & postcode, receipt number, reason for the request,
copy of official purchase receipt
Attach your purchase receipt and save with this Manual for future reference.
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